Muscular, brawny (5)
I believe the answer is:
beefy
I believe this clue is a double definition.
'muscular' is the first definition.
(I've seen this before)
'brawny' is the second definition.
(I've seen this in another clue)
(Other definitions for beefy that I've seen before include "Athletic and muscular (non-vegetarian?)" , "Strong and muscular" , "Burly" , "Colloquially muscular" , "Brawny" .)